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memory: introduce memory_region_present

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This new API will avoid having too many memory_region_ref/unref
in paths that currently use memory_region_find.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-07-02 13:40:48 +02:00
parent 46637be269
commit 3ce10901ca
4 changed files with 28 additions and 7 deletions
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12
include/exec/memory.h
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@ -836,6 +836,18 @@ void memory_region_set_address(MemoryRegion *mr, hwaddr addr);
void memory_region_set_alias_offset(MemoryRegion *mr,
hwaddr offset);
/**
* memory_region_present: translate an address/size relative to a
* MemoryRegion into a #MemoryRegionSection.
*
* Answer whether a #MemoryRegion within @parent covers the address
* @addr.
*
* @parent: a MemoryRegion within which @addr is a relative address
* @addr: the area within @parent to be searched
*/
bool memory_region_present(MemoryRegion *parent, hwaddr addr);
/**
* memory_region_find: translate an address/size relative to a
* MemoryRegion into a #MemoryRegionSection.